things that can be represented by a single table. An example of this is in the EMPLOYEE table; data about the entity (the employee) is in the table rows and data about the entity’s attributes are in the rows. 2.3 List the characteristics a table must have to be a relation: * Each row of the table holds data that pertain to some entity or a portion of some entity * Each column contains data of the attributes of the entity * The cells must hold a single value; no repeating elements
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------------------------------------------------- GeRard ryan relational database assignment T T N N E E R R U U Contents Introduction - 2 - Description of Assignment - 2 - Problems & Solutions - 4 - Normalisation - 5 - Data dictionary - 0 - Relationships between each Table - 5 - Database Tables - 6 - Introduction Description of Assignment The company I have decided to base this assignment on is a fictional one that is a DVD/ Games rental outlet. They rent and
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Chapter 4: Constraints TRUE/FALSE 1. Constraints are rules used to enforce business rules‚ practices‚ and policies. ANS: T PTS: 1 REF: 91 2. Constraints are used to ensure the accuracy and integrity of the data contained in the database. ANS: T PTS: 1 REF: 91 3. A constraint can only be created as part of the CREATE TABLE command. ANS: F PTS: 1 REF: 93 4. A constraint name can consist of up to 10 characters. ANS: F PTS: 1 REF: 93 5. A primary key is usually given the abbreviation _pk
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AutoParts Warehouse 1. Draw an ERD for AutoParts Warehouse indicating the types of relationships between the entities. 2. Owns CUSTOMER 1 VEHICLE M M ORDERS N N PARTS INVENTORIES 1 STORE M REQUEST M TRANSFER 2. For each of the entities identified‚ design tables and identify the possible candidate keys‚ the primary key‚ a probable foreign key‚ and potential secondary keys. a. PARTS (PART_NUMBER‚ STORE_NUMBER‚ PART_DESCRIPTION‚ QTY_ON_HAND‚ COST‚
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http://hdl.handle.net/2451/31553 Data Science and Prediction Vasant Dhar Professor‚ Stern School of Business Director‚ Center for Digital Economy Research March 29‚ 2012 Abstract The use of the term “Data Science” is becoming increasingly common along with “Big Data.” What does Data Science mean? Is there something unique about it? What skills should a “data scientist” possess to be productive in the emerging digital age characterized by a deluge of data? What are the implications for business
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1. Business process reengineering (BPR) is the fundamental analysis and redesign of workflow within and between enterprises. 2. Reengineering is the fundamental rethinking and radical redesign of business processes to achieve dramatic improvements in critical contemporary measures of performance such as cost‚ quality‚ service and speed. 3. BPR reached its heyday in the early 1990’s when Michael Hammer and James Campy published their best-selling book‚ "Reengineering the Corporation". The
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INTRODUCTION Background of the Study Tourism is one business sector of our country that really helps in providing jobs and incomes to our country as a whole. Tourism consists of service industries including transportation services‚ such as airlines‚ cruise ships‚ and taxicabs; hospitality services‚ such as accommodations‚ Including hotels and resorts; and entertainment venues‚ such as amusement parks‚ casinos‚ shopping malls‚ music venues and theatres. A hotel which is the focus of our
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fromordinary tables and files. Ans:Tables and files have some particular order but relations don’t. ordinary tablesand files are static while a relational database has data thatis dependent on the data that is entered in tuples that are related to thatattribute. in the ordinary tables and files‚ there are no constraintsrelated to the related data and a user could input whatever they wanted Q. Discuss the various reasons that lead to the occurrence of null values in relations in detail? Each value
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Chapter1. Planning Phase 1.1 Background of the Study The East Avenue Medical Center (EAMC) was organized by virtue of Executive Order # 48. 1986 of President Corazon C. Aquino. It was formerly named the Hospital ng Bagong Lipunan which was established on January 8‚ 1978 by virtue of Presidential Decree number 1411 after the dissolution of the old Government Service Insurance System (GSIS) General Hospital which transferred all its assets‚ liabilities and properties to the Ministry of Health. The
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IS3280 Data Management Assignment 5 Mapping ER Diagrams to Tables Submit via D2L. You can create your tables using the Table feature in word [or you can use Gliffy‚ Visio…]. The Table should be 1 column and the number of rows equals the number of attributes. Underline primary keys and italicize foreign keys. Use only the box border. The Table name goes above the table. For example: TABLE_NAME PrimaryKey AttributeOne AttributeTwo AttributeThreeForeignKey *the above table has a
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